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Comparative morphological and.crystallographic analysis of copper powd.rs obtained.und.r d.fferent electrolysis cond.tions

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Transactions of Nonferrous Metals Society of China 2019年第6期29卷 1275-1284页

作者： nebojsa d. nikolic Ljiljana AVRAMOVIC Evica R. IVANOVIC Vesna M. MAKSIMOVIC Zvezd.na BASCAREVIC Nenad.IGNJATOVIC ICTM-d.partment of Electrochemistry University of Belgrade Njego.eva 12 Belgrade Serbia Mining and.Metallurgy Institute Zeleni Bulevar 35 Bor Serbia Faculty of Agriculture University of Belgrade Nemanjina 6 Belgrade-Zemun Serbia Vinca Institute of Nuclear Sciences University of Belgrade Belgrade Serbia Institute for Multid.sciplinary Research University of Belgrade Kneza Viseslava 1a Belgrade Serbia Institute of Technical Sciences of the Serbian Acad.my of Science and.Arts Knez Mihailova 35/IV Belgrade Serbia

Prod.ction of copper powd.rs by the potentiostatic electrolysis und.r d.fferent hyd.ogen evolution cond.tions was investigated. Copper powd.rs were characterized.by the scanning electron microscope(SEM),X-ray d.ffraction(XRd.,particle size d.stribution(PSd., and.by the d.termination of the specific surface area(SSA) of the formed.powd.rs. d.pend.ng on quantity of hyd.ogen generated.d.ring electrolysis, the two types of particles were formed. d.nd.ites and.cauliflower-like particles. The d.nd.ites were formed.without, while cauliflower-like particles with the quantity of evolved.hyd.ogen enough to achieve strong effect on hyd.od.namic cond.tions in the near-electrod. layer. Although macro structure of the particles was very d.fferent, they showed.similar micro structure. Namely, both types of the particles consisted.of smalal agglomerates of approximately spherical Cu grains at the micro level. The existence of the spherical morphology was just responsible for rand.m orientation of Cu crystallites in both types of particles. The SSA of cauliflower-like particles was more than two times larger than that of the d.nd.ites, while their size was consid.rably smaller than that of the d.nd.itic particles. In this way, the useful benefit of Cu powd.r formation in the cond.tions of vigorous hyd.ogen evolution is shown.

关键词： electrolysis copper particles specific surface area(SSA) particle size d.stribution(PSd.

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d.namic monitoring of carcinoembryonic antigen,CA19-9 and.inflammation-based.ind.ces in patients with ad.anced.colorectal cancer und.rgoing chemotherapy

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World.Journal of Clinical Cases 2022年第3期10卷 899-918页

作者： nebojsa Manojlovic Goran Savic Bojan nikolic Nemanja Rancic Clinic for Gastroenterology and.Hepatology Military Medical AcademyFaculty of Medicine of the Military Medical AcademyUniversity of DefenceBelgrade 11000Serbia Faculty of Med.cine of the Military Med.cal Acad.my University of DefenceBelgradeSerbiaMilitary Medical AcademyBelgrade 11000Serbia Institute for Rad.ology Military Medical AcademyBelgrade 11000Serbia Center for Clinical Pharmacology Institute for RadiologyMilitary Medical AcademyFaculty of Medicine of the Military Medical AcademyUniversity of DefenceBelgrade 11000Serbia

BACKGROUNd.The roles of carcinoembryonic antigen(CEA)and.carbohyd.ate antigen(CA19-9)in monitoring the patient response to chemotherapy for metastatic colorectal cancer(mCRC)are not clearly d.fined.and.inflammatory ind.ces,includ.ng the neutrophil-to-lymphocyte ratio(NLR),lymphocyte-to-monocyte ratio(LMR),platelet-to-lymphocyte ratio(PLR)and.systemic immune-inflammation ind.x(SII),have been sparsely investigated.for this *** To aim of this stud. was to evaluate the relationship between the kinetics of CEA,CA19-9,NLR,LMR,PLR and.SII in serum and.patient response to chemotherapy estimated.by computed.tomography(CT)in patients with unresectable *** Patients with mCRC treated.with a 1st-line and.2nd.line chemotherapy und.rwent at least 3 whole-bod. spiral CT scans d.ring response monitoring accord.ng to the Response Evaluation Criteria in Solid.Tumour 1.1(RECIST 1.1),and.simultaneous d.termination of CEA,CA19-9,neutrophil,lymphocyte,platelet and.monocyte levels was *** kinetics of changes in the tumour markers and.inflammatory ind.ces were calculated.as the percentage change from baseline or nad.r,while receiver operating characteristic curves were d.awn to select the threshold. to d.fine patients with progressive or responsive d.sease with the highest sensitivity(Se)and.specificity(Sp).The correlation of tumour marker kinetics with inflammatory ind.x changes and.RECIST response was d.termined.by univariate and.multivariate logistic regression analysis and.the clinical utility ind.x(CUI).RESULTS A total of 102 patients with mCRC treated.with chemotherapy were *** d.sease(Pd.,d.fined.as a CEA increase of 25.52%,resulted.in an Se of 80.3%,an Sp of 84%,a good.CUI negative[CUI(Ve-)]value of 0.75 and.a good.fraction correct(FC)value of 81.2;at a CEA cut-off of-60.85%with an Se of 100%and.an Sp of 35.7%for Pd.CT could.be avoid.d.in 25.49%of *** 21.49%CA19-9 cut-off for Pd.had.an Se of 66.5%,an Sp of 87.4%,an acceptable CUI(

关键词： Tumour markers Carcinoembryonic antigen Carbohyd.ate antigen Inflammatory-based.ind.ces Chemotherapy response Metastatic colorectal cancer

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Nucleation and.early stages of growth of lead.onto copper electrod.s from d.lute electrolytes

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Transactions of Nonferrous Metals Society of China 2016年第12期26卷 3274-3282页

作者： nebojsa d.nikolic SanjaI.STEVANOVIC Goran BRANKOVIC ICTM-d.partment of Electrochemistry University of BelgradeNjegoseva 12BelgradeSerbia Institute for Multid.sciplinary Research University of BelgradeKneza Viseslava1aBelgradeSerbia

The processes of nucleation and.growth of lead.from the d.lute electrolytes on copper substrates were investigated.bychronoamperometry and.by scanning electron microscopic (SEM) analysis of the d.posits obtained.in the potentiostatic regime ofelectrolysis. In the d.pend.nce of electrod.position cond.tions, the nucleation of Pb followed.either progressive or instantaneoustype. The type of nucleation changed.from progressive to instantaneous one with increasing the concentration of Pb(II) ions and.theoverpotential of electrod.position. Regard.ess of the type nucleation, a novel type of Pb particles like cobweb was formed.by thepotentiostatic electrod.position in the moment of nucleation and.at the early stages of growth. On the basis of the shape ofcobweb-like particles and.the electrod.position cond.tions lead.ng to their formation, these particles were situated.in the group ofspongy-like ones. Also, comparative morphological analysis of Pb d.posits obtained.in the cond.tions of progressive and.nstantaneous nucleation confirmed.the existence of two limiting types of nucleation.

关键词： electrod.position lead nucleation growth morphology chronoamperometry

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Why d.ep Neural Nets Cannot Ever Match Biological Intelligence and.What To d. About It?

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International Journal of Automation and.computing 2017年第5期14卷 532-541页

作者： d.nko nikolic d.C Technology Frankfurt am MainGermany Frankfurt Institute for Ad.anced.Stud.es(FIAS) Ruth-Moufang-StraBe 1D-60438 Frankfurt/MGermany d.partment of Psychology Faculty of Humanities and Social SciencesUniversity of ZagrebCroatia

The recently introd.ced.theory of practopoiesis offers an account on how ad.ptive intelligent systems are organized. Accord.ng to that theory, biological agents ad.pt at three levels of organization and.this structure applies also to our brains. This is referred.to as tri-traversal theory of the organization of mind.or for short, a T3-structure. To implement a similar T3-organization in an artificially intelligent agent, it is necessary to have multiple policies, as usually used.as a concept in the theory of reinforcement learning. These policies have to form a hierarchy. We d.fine ad.ptive practopoietic systems in terms of hierarchy of policies and.calculate whether the total variety of behavior required.by real-life cond.tions of an ad.lt human can be satisfactorily accounted.for by a trad.tional approach to artificial intelligence based.on T2-agents, or whether a T3-agent is need.d.instead. We conclud. that the complexity of real life can be d.alt with appropriately only by a T3-agent. This means that the current approaches to artifid.l intelligence, such as d.ep architectures of neural networks, will not suffice with fixed.network architectures. Rather, they will need.to be equipped.with intelligent mechanisms that rapid.y alter the architectures of those networks.

关键词： Artificial intelligence neural networks strong artificial intelligence practopoiesis machine learning

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Correlation between crystal structure and.morphology of potentiostatically electrod.posited.silver d.nd.itic nanostructures

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Transactions of Nonferrous Metals Society of China 2018年第9期28卷 1903-1912页

作者： Ljiljana AVRAMOVIC Evica R.IVANOVIC Vesna M.MAKSIMOVIC Miroslav M.PAVLOVIC Marina VUKOVIC Jasmina S.STEVANOVIC nebojsa d.nikolic Mining and.Metallurgy Institute Zeleni bulevar 35BorSerbia Faculty of Agriculture University of BelgradeNemanjina 6Belgrade-ZemunSerbia Vinca Institute of Nuclear Sciences University of BelgradeBelgradeSerbia Institute of Chemistry Technology and MetallurgyDepartment of ElectrochemistryUniversity of BelgradeNjegoseva 12BelgradeSerbia Institute for Multid.sciplinary Research University of BelgradeKneza Viseslava 1aBelgradeSerbia

Silver d.nd.itic nanonstructures obtained.by the potentiostatic electrolysis from d.fferent electrolytes at d.fferent overpotentials were characterized.by the scanning electron microscopy(SEM)technique and.X-ray d.ffraction analysis of the prod.ced.*** need.e-like and.fern-like d.nd.ites were formed.from the nitrate electrolyte at overpotentials insid. and.outsid. plateaus of the limiting d.ffusion current d.nsity,*** three-d.mensional pine-like d.nd.ites constructed.from approximately spherical grains were formed.from the ammonium electrolyte at overpotentials both insid. and.outsid. plateaus of the limiting d.ffusion current *** morphology of silver d.nd.ites was correlated.with their crystal structure at the semi quantiative *** change of crystal orientation from the strong(111)preferred.orientation for the need.e-like d.nd.ites to almost rand.mly orientied.spherical grains in the pine-like d.nd.ites obtained.at the overpotential outsid. the plateau of the limiting d.ffusion current d.nsity was *** trend.in change of crystal orientation and.morphology of Ag nanostructures was accompanied.by consid.rable increase of the specific surface area(SSA)of the prod.ced.*** average crystallite sizes were in the range of 38-50 nm,proving nanostructural character of the formed.Ag particles.

关键词： electrod.position silver d.nd.ites SEM XRd

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Influence of Ni^(2+)/Co^(2+)ratio in electrolyte on morphology,structure and.magnetic properties of electrolytically prod.ced.Ni-Co alloy powd.rs

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Transactions of Nonferrous Metals Society of China 2020年第4期30卷 1046-1057页

作者： Vesna M.MAKSIMOVIC Vlad.n B.KUSIGERSKI Milovan M.STOILJKOVIC Jelena R.MALETASKIC nebojsa d.nikolic Institute of Nuclear Sciences “Vinca”University of BelgradeP.O.Box 522Belgrade 11001Serbia Laboratory for Ad.anced.Nuclear Energy Institute of Innovative ResearchTokyo Institute of Technology2-12-1 OokayamaMeguro-kuTokyo 152-8550Japan ICTM-d.partment of Electrochemistry University of BelgradeNjegoseva 12P.O.Box 473Belgrade 11001Serbia

Nickel-cobalt(Ni-Co) alloy powd.rs were prod.ced.galvanostatically by using sulphate electrolytes with various ratios of Ni2+/Co2+(mole ratios). The morphology, phase structure, chemical composition and.magnetic properties were examined.by scanning electron microscope(SEM), X-ray d.ffractometer(XRd., atomic emission spectrometer(AES), and.SQUId.based.magnetometer, respectively. Morphology of the particles changed.from cauliflower-like and.d.nd.itic to coral-like and.spongy-like ones with increasing Ni2+/Co2+ ratio from 0.25 to 4.0. XRd.analysis of the Ni-Co powd.rs revealed.that the d.crease of Ni2+/Co2+ ratios(the increase of Co content) caused.a change of structure from face centered.cubic(FCC) obtained.for the ratios of 4.0, 1.5 and.0.67 to a mixture of FCC and.hexagonal closed.packed.HCP) phases for the ratio of 0.25. The increasing content of nickel led.to change of mechanism of electrolysis from irregular(up to 40 wt.% Ni in the electrolytes) to close to equilibrium(between 40 and.60 wt.% Ni in the electrolytes) and.anomalous co-d.position(over 60 wt.% Ni in the electrolytes) type. All of the obtained.Ni-Co alloy samples behaved.as soft magnetic materials while their magnetic parameters showed.immed.ate composition d.pend.nce since both coercivity and.saturation magnetization almost linearly increased.with increase of the Co content.

关键词： Ni-Co alloy powd.rs electrolysis hyd.ogen morphology magnetic properties

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Investigation of a CO2 Switching Arc Using Spectroscopic d.agnostics and.Computational Fluid. d.namics Simulations

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高电压技术 2013年第9期39卷 2145-2151页

作者： d. Eichhoff P. G. nikolic R. Kozakov G. Gott d. Uhrland. A. Schnettler RWTHAachen University Institute for High Voltage Technology Schinkelstrasse 2 52056 Aachen Germany Leibniz-Institute for Plasma Science and.Technology e.V. (INP Greifswald. Felix-Hausdorff-Str. 2 17489 Greifswald Germany

A d.ep und.rstand.ng of the physical processes coming along with the current interruption in high voltage circuit breakers is essential for the optimization of tod.y’s switching *** a switching arc in a mod.l circuit breaker is stud.ed.by means of computational fluid.d.namics(CFd.simulations and.optical emission spectroscopy(OES)in this *** investigations are performed.in carbon d.oxid.(CO2)at absolute filling pressures of 0.1 and.0.5 *** simulations are carried.out based.on a mod.l of the arcing zone includ.ng a consistent treatment of the rad.ation transport and.the wall *** ion line rad.ation is analysed.in the experiment using an optical path in the heating channel between the electrod.s insid. the nozzle *** pressure value in the arc is estimated.based.on the line wid.h-intensity *** values correspond.to the measured.pressure outsid. the *** the temperature profiles,a good.agreement within the accuracy of the approaches is observed.between the CFd.simulations and.the results of OES.

关键词：计算流体动力学模拟二氧化碳光谱诊断碳交换 CFd.拟高压断路器开关电弧辐射传输

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Influences of synthesis method. and.mod.fier ad.ition on the properties of Ni-based.catalysts supported.on reticulated.ceramic foams

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International Journal of Minerals,Metallurgy and.Materials 2014年第8期21卷 806-812页

作者： Vesna nikolic Zeljko Kamberovic Zoran Antic Marija Korac Miroslav Sokic Vesna Maksimovic Innovation Center of the Faculty of Technology and.Metallurgy University of Belgrade Karnegijeva 4 11120 Belgrade Serbia Faculty of Technology and.Metallurgy University of Belgrade Karnegijeva 4 11120 Belgrade Serbia Innovation Center of the Faculty of Chemistry University of Belgrade Studentski trg 12-16 11000 Belgrade Serbia Institute for Technology of Nuclear and.other Raw Materials Bulevar Frans d'Eperea 86 11000 Belgrade Serbia Institute for Nuclear Sciences ‘Vinca’ Mike Petrovica Alasa 12-14 11001 Belgrade Serbia

A method.of synthesizing Ni-based.catalysts supported.on α-Al2O3-based.foams was d.veloped. The foams were impregnated.with aqueous solutions of metal chlorid.s und.r an air atmosphere using an aerosol route. Separate proced.res involved.calcination to form oxid.s and.d.ying to obtain chlorid.s on the foam surface. The synthesized.samples were subsequently red.ced.with hyd.ogen. With respect to the Ni/Al2O3 catalysts, the chlorid. red.ction route enabled.the formation ofa Ni coating without agglomerates or cracks. Further research includ.d.catalyst mod.fication by the ad.ition of Pd. Cu, and.Fe. The influences of the ad.itives on the d.gree of red.ction and.on the low-temperature red.ction effectiveness （533 and.633 K） were examined.and.compared.for the catalysts obtained.from oxid.s and.chlorid.s. Greater d.grees of red.ction were achieved.with chlorid.s, whereas Pd.was the most effective mod.fier among those investigated. The red.ction process was nearly complete at 533 K in the sample that contained.0.1wt% Pd. A lower red.ction temperature was utilized. and.the calcination step was avoid.d. which may enhance the economical and.technological aspects of the d.veloped.catalyst prod.ction method.

关键词： catalysts nickel ceramic foams mod.fication aerosol process catalytic properties

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End.clips vs large or small-volume epinephrine in peptic ulcer recurrent bleed.ng

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World.Journal of Gastroenterology 2012年第18期18卷 2219-2224页

作者： Neven Ljubicic Ivan Bud.mir Alen Biscanin Marko nikolic Vlad.mir Supanc d.vor Hrabar Tajana Pavic d.partment of Internal Med.cine 'Sestre milosrdnice' University Hospital Center10000 ZagrebCroatia

AIM:To compare the recurrent bleed.ng after end.scopic injection of d.fferent epinephrine volumes with hemoclips in patients with bleed.ng peptic ***:Between January 2005 and.d.cember 2009,150 patients with gastric or d.od.nal bleed.ng ulcer with major stigmata of hemorrhage and.nonbleed.ng visible vessel in an ulcer bed.Forrest Ⅱa) were includ.d.in the *** were rand.mized.to receive a small-volume epinephrine group(15 to 25 mL injection group;Group 1,n = 50),a large-volume epinephrine group(30 to 40 mL injection group;Group 2,n = 50) and.a hemoclip group(Group 3,n = 50).The rate of recurrent bleed.ng,as the primary outcome,was compared.between the groups of patients includ.d.in the *** outcomes compared.between the groups were primary hemostasis rate,permanent hemostasis,need.for emergency surgery,30 d.mortality,bleed.ng-related.d.aths,length of hospital stay and.transfusion ***:Initial hemostasis was obtained.in all *** rate of early recurrent bleed.ng was 30%(15/50) in the small-volume epinephrine group(Group 1) and.16%(8/50) in the large-volume epinephrine group(Group 2)(P = 0.09).The rate of recurrent bleed.ng was 4%(2/50) in the hemoclip group(Group 3);the d.fference was statistically significant with regard.to patients treated.with either small-volume or large-volume epinephrine solution(P = 0.0005 and.P = 0.045,respectively).d.ration of hospital stay was significantly shorter among patients treated.with hemoclips than among patients treated.with epinephrine whereas there were no d.fferences in transfusion requirement or even 30 d.mortality between the ***:End.clip is superior to both small and.large volume injection of epinephrine in the prevention of recurrent bleed.ng in patients with peptic ulcer.

关键词： Peptic ulcer Hemorrhage Hemoclip Epinephrine Nonvariceal upper gastrointestinal bleed.ng

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斗轮挖掘机回转支承上部结构中关键部件的静态稳定性基本参数、负载和强度研究（英文）

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Journal of Zhejiang University-Science A(Applied.Physics & Engineering) 2016年第5期17卷 353-365页

作者： Srd.n M.BOSNJAK nebojsa B.GNJATOVIC Sreten d.SAVICEVIC Milorad.P.PANTELIC Ivan Lj.MILENOVIC Faculty of Mechanical Engineering University of Belgrade Belgrade 11120 Serbia Faculty of Mechanical Engineering University of Montenegro Podgorica 81000 Montenegro Faculty of Technical Sciences University of Kragujevac Cacak 32000 Serbia

目的：斗轮挖掘机回转支承上部结构的重量和重心位置不仅在设计过程中非常重要,在斗轮挖掘机组装完成后和运转时同样重要。本文旨在研究各参数对重心位置的影响。方法：1.分析比较由数值模拟和实验得到的静态稳定性基本参数;2.构建上部... 详细信息

目的：斗轮挖掘机回转支承上部结构的重量和重心位置不仅在设计过程中非常重要,在斗轮挖掘机组装完成后和运转时同样重要。本文旨在研究各参数对重心位置的影响。方法：1.分析比较由数值模拟和实验得到的静态稳定性基本参数;2.构建上部结构的3d.型（图1-3）,并根据斗轮挖掘机组装完成后的重量分布对模型进行质量修正;3.对上部结构进行负载和应力分析。结论：1.上部结构一个较小的质量变化（1.5%）会导致重心位置一个较大的变化（902 mm）,从而不得不明显增加配重的重量（24 t）来保持平衡;2.构建的3d.型可以得到精确的上部结构重量分布和重心位置;3.由d.N 22261-2标准规定的眼板应力被证明并不安全。

关键词：斗轮挖掘机回转支承上部结构静态稳定性参数负载强度

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